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The Andromeda Galaxy . also known as Messier 31 , M 31 , or NGC 224 , is spiral galaxy approximately , 780 kiloparsecs , 2.5 , million light years , from Earth . It is the nearest major galaxy to the Milky Way and was often referred to as the Great Andromeda Nebula in older texts . name from the area of the sky in which it appears , the constellation of Andromeda which was named after the mythological princess Andromeda Being approximately 220,000 light years across:

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For more amazing images and posts about how Astronomy is Awesome, check us out! http://astronomyisawesome.com/ As always, please feel free to ask questions and we love it when you reblog! #astronomy...